[Fot] Never be beaten by equipment

[tr4racing at googlemail.com]

We did a lot of testing with torque plate and we found NO difference with or without.
Gesendet mit BlackBerry von Vodafone

-----Original Message-----
From: fubog1 <fubog1 at aol.com>
Date: Tue, 11 Sep 2012 16:21:56 
To: <johnstydo at gmail.com>
Cc: <mmoore at wave1.net>; <jhhasty at gdhs.com>; <tr4racing at googlemail.com>; <fot at autox.team.net>
Subject: Re: [Fot] Never be beaten by equipment


 The other point that should be mentioned is that these liners should be honed using a torque plate.
They get out of shape once they are clamped down in place.
FWIW I use JE pistons and set them at .004, usually with coated skirts as an added insurance policy against scuffing.
Glen

 

 

-----Original Message-----
From: John Styduhar <johnstydo at gmail.com>
To: fubog1 <fubog1 at aol.com>
Cc: mmoore <mmoore at wave1.net>; jhhasty <jhhasty at gdhs.com>; tr4racing <tr4racing at googlemail.com>; fot <fot at autox.team.net>
Sent: Tue, Sep 11, 2012 2:42 pm
Subject: Re: [Fot] Never be beaten by equipment


My math shows that MadMarx is running .005" piston to wall clearance (.13mm/25.4 mm/inch=.005.  Wiseco's suggested clearance for their forged 87mm slugs is .004, but others (BFE)  have recommended .006, which is what my machinist is honing to. 

On Tue, Sep 11, 2012 at 1:16 PM, fubog1 <fubog1 at aol.com> wrote:

 I'll try this again, my reply had too much text.
The manufacturers will call out a recommended clearance, but that's all it is.
The operating speed, temperatures, cooling systems etc all are variables.
Generally the harder it is run, the more clearance it needs.
Also pistons can scuff during warm-up, under certain conditions, so it's a
good thing to get it up to temp before flogging it hard.
Glen